Clutch



d rum .TW mm /WZ 5. 7, r n 4 ,ee r im W6. IZ g Z wn. W @WAM w. w. mmm U m Mar 6, 1923 fc'vze/S Patented Mar. 6, 1923.

' lgidilghttii earanreerrce.

y CARL zn'r'rnnnunn, or CHICAGO, ILLiNors.

i CLUTCH.

application fue@ october'ir, 1921. seriarno. 508,207.

To all whom mag/'concern' v Be it known that LGARnZnT'rnRLUND, a citizen of the United Statesyand a resident yof Cliicago,in the county of Cook 'and State of lllinois, have invented certainnew and useful Improvements in a? Clutch,f ofV which the following is a specification. L This invention has relation to clutches in d general, but particularly `to a clutch which is especially designedforuse in connection -with a drum'orpulley having an overhanging flange, and it consists incertain peculiarities of the construction, novel arrange-2 nient, combination and `cooperation of the parts "thereof as will be hereinafter more fully set forth and specilicallyclaimed.

The object ofthe invention is toprovide a clutch of the above mentioned general charactenfwhich shall be'very simpleand eiiicient and positive in Vits operation. d

ln the accompanying drawing which serves tol illustrate Lan` embodiment of the invention Y n F ig. l is a central sectional view through a drum showing it Iloosely mounted o-n a shaft and illustrating aclutch embodying my improvements Xedly mounted on said shaft with its parts shown by dotted lines `in their operative positions and by continuous lines in their inoperative or unclutched positions. d

2 is a face view of the drum and clutch looking from the operative lever` for `the latter, and Fig. 3 is a detail sectional view of portions of the operating lever and connecting link for the clutch, showing the means for connecting said parts.

Like numerals of reference referto like parts in the views of the drawing.

The referencer numeral 5 designates a drum or pulley which is loosely mounted on a shaft 6 and has on at least one of the sides of its spokes 7 an overhanging flange 8 which flange is extended parallel with the axis of the shaft. The flange 8 of the drum or pulley is provided on its inner surface at equidistant points' with a plurality of lugs 9 each of which is by preference of the shape shown in Fig. l, that is to say, has straight side edges or walls l0, which walls are rounded towards each other at that end of the lug adjacent the `spokes or web 7 of the drum.

55 'By reference to Fig. l, it will be seen that inexpensive in construction, strong, durable,

v the drum 5 is provided with a hub ll on one side only of the spokes 7 and that the hub l2 of the clutch is mounted on the shaft' Gand liXed thereto preferably by means of afVVoodrulf key 13 on the other side of said spokes. A washer 14e is by preference interposed between the huh of the drum and the adjacent end of the hub l2 of the clutch and surrounds the shaft as is obvious.`

VvExtended from the hub l2 ofthe clutch is an arm l5 which terminates at its free end a short distance inwardly from the inner surfaces of the lugs 9 of the drum.

Pvotally mounted near its outer end on one side of the arm l5 near its outer end is a clutch 'arm 1G which is provided around its pivot 1'? with a flat-faced hub 18 to provide an enlarged bearing against the arm l5 in order to yprevent wabbling of the clutch arm 16 inthe operation the device. `Extended radially` from the hub 18 of the clutchrarin is a lug engaging arm 19 of such length that when the clutch arm 16"is moved `from the position shown by continuous lines to that shown by dotted lines in Fig. 1 of the drawing7 its outer end will not Contact with the inner surface of the flange 8 of the drum but will con tact with one of the straight edged sides of one of the lugs 9 on the flange ofthe drum. Pivotally connected to the free end of the clutch arm 16 is one end of a link 2O the other end of which is swivelled to an operating lever 21 which may be suitably fulcrumed on a support near the end of the shaft 6, on which the drum and clutch is mounted.

As shown in Fig. 3 of the drawing, that end of the link 2O wihch is connected to the operating lever 2l is provided on its surface adjacent said lever with a semispherical enlargement 22 which fits in and co-acts with a` similar shaped socket 23 in the adjacent surface of said lever. The link 20 has extended transversely therethro-ugh, as well as through the part 22, a counter-sunk opening 24, or an opening which is flared towards the lever. The lever also has a transverse opening 25 flared towards the opening 2%. link 2O and lever 2l is a bolt 26 which is extended through said openings and held in position by means of a nut 27 mounted on one of its ends. By this arrangement it is manifest that when the clutch is thrown into Connecting the engagement with one of the lugs 9 on its fiange, the drum 5 Will be caused to rotate` to'permit this movement Without unduev interference With the operating lever, the ball and socket or universal joint above described and illustrated in, Fig. 3 lof the drawing is employed.

By reference to Fig. l, it Will be seen that the lug engaging arm 1.9 of the clutch is radially disposed with respect to the pivot 17 of the clutch arm 16,' While the latter arm is tangentially disposed with respect to said pivot. By this arrangement, Whentheparts are positioned as shown by dotted lines in Fig. 1, it is evident that the clutch arm 16 Will approach one of the spokes and thus cause the lug engaging arm 19 to positively engage one of the lugs on the drum.

Having thus fully described my invention, what I claim as new and desire to ,secure by Letters Patent isv l. The combination with a rotatable shaft, of a drum loosely mounted thereon and having an overhanging fiange provided on ,its inner surface with spaced lugs7 a supporting arm keyed to said shaft hunder the flange of the drum, a clutch arm pivotally mounted on the supporting arm near the free end ofsthe. latter and having a lug engaging arm at its outer portion, a link "pivoted-at one of its ends to the clutch ,armv near its inner end, an operating lever n suitably fulcrulned near one end of said shaft, and a universal connection uniting said leverand the outer end of saidk link.

2. The combination with a rotatable shaft, of a drum loosely mounted ltheron and having an overhanging flange provided on its inner surface with spaced lugs, a supportingV arinkeyed to-said shaft under ,d the flange of .the drum, a clutch arm .piv-

otallyrnountedfon the supporting arrnnear the Sfreeend yof the latter andhaving a' lug engaging arni Vat its outer portion radially disposed with the pivot of the clutch arm, a link pivoted at one Aof itsends to the clutch arrn near its innen end and having on its opposite end' a laterally extended rounded enlargement, anoperating lever suitably fulcrunied nearone end of said shaft and havingaisocketin its surface adjacent" said link to receive the enlargement thereoin-said link and lever having oppositely flared coinciding openings and a bolt extending through said openings and loosely connectingthe link and lever. v

CARL ZETTERLUN D. 

